Rotons and Quantum Evaporation from Superfluid 4He
Condensed Matter
2009-10-28 v1
Abstract
The probability of evaporation induced by and rotons at the surface of superfluid helium is calculated using time dependent density functional theory. We consider excitation energies and incident angles such that phonons do not take part in the scattering process. We predict sizable evaporation rates, which originate entirely from quantum effects. Results for the atomic reflectivity and for the probability of the roton change-mode reflection are also presented.
Keywords
Cite
@article{arxiv.cond-mat/9505121,
title = {Rotons and Quantum Evaporation from Superfluid 4He},
author = {F. Dalfovo and A. Fracchetti and A. Lastri and L. Pitaevski and S. Stringari},
journal= {arXiv preprint arXiv:cond-mat/9505121},
year = {2009}
}
Comments
11 pages, REVTEX, 3 figures available upon request or at http://anubis.science.unitn.it/~dalfovo/papers/papers.html